There's no denying that the 2014 Chevrolet Spark is a youthful car, aimed at the vibrant millennial customers GM desperately wants to lure into showrooms. That said, when stacked against some of its supersmall-car competitors -- such as the Scion iQ, the Mitsubishi Mirage, and the Fiat 500 -- the 2014 Chevrolet Spark actually looks like a surprisingly mature choice.